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    CVE-2026-101061

    utcp-gql before 1.1.1 and utcp-websocket before 1.1.1 contain server-side request forgery vulnerabilities due to incomplete application of CVE-2026-44661 fixes. The GraphQL plugin uses a vulnerable prefix check allowing bypass URLs like http://127.0.0.1.attacker.example, while the WebSocket plugin performs no URL validation despite documented security requirements. Attackers can force connections to internal services and cloud metadata endpoints by supplying malicious tool URLs in call templates, and receive configured API keys and OAuth tokens sent to attacker-controlled hosts.

    Published:Sep 27, 2026
    Last Modified:Sep 30, 2026
    EPS:Sep 27, 2026
    EPSS Score:0.00199
    CVSS Score:4.7

    Affected Products

    Vendor
    Universal-tool-calling-protocol
    Product
    Python-utcp

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-918 Server-Side Request Forgery

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

    CVE-2026-101060 (CVSS 8.4) — python-utcp versions before 1.1.4 contain a server-side request forgery vulnerability in HttpCommunicationProt…
    CVE-2026-101059 (CVSS 7.1) — utcp-http before 1.1.4 fails to validate the OAuth2 tokenUrl field from remote OpenAPI specifications, allowin…
    CVE-2026-101058 (CVSS 7.1) — python-utcp (pip package utcp-http) before 1.1.12 does not verify whether tool URLs declared in a hand-written…
    CVE-2026-101057 (CVSS 2.3) — utcp-mcp (the MCP plugin of python-utcp) through 1.1.2 connects to the HTTP and WebSocket MCP server URLs give…
    CVE-2026-12210 (CVSS 2.1) — A vulnerability was detected in universal-tool-calling-protocol python-utcp 1.1.0. This affects an unknown fun…
    CVE-2026-45369 (CVSS 8.3) — python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_comm…
    CVE-2026-45370 (CVSS 7.7) — python-utcp is the python implementation of UTCP. Prior to 1.1.3, _prepare_environment() in cli_communication_…
    CVE-2026-44661 (CVSS 4.7) — python-utcp is the python implementation of UTCP. Prior to 1.1.3, the utcp-http plugin is vulnerable to a blin…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High